Translation of The Passenger by Kings Of Convenience

From:

I didn't know you were there
until you said hello.
You had been watching me
for I don't know how long.
I hit my head against the lamp,
as by surprise I stood up.
Don't be afraid, you said,
it's only me- The door wasn't locked.
The voice I'd heard in the hall
was hard to recognise.
But now we know he's onboard,
wearing our disguise.
If only you and I could trust
each other through this,
then together we could
work out who
the enemy is.
Translate to:

I didn't know you were there
until you said hello.
You had been watching me
for I don't know how long.
I hit my head against the lamp,
as by surprise I stood up.
Don't be afraid, you said,
it's only me- The door wasn't locked.
The voice I'd heard in the hall
was hard to recognise.
But now we know he's onboard,
wearing our disguise.
If only you and I could trust
each other through this,
then together we could
work out who
the enemy is.